Summary & Overview

CPT 87071: Aerobic Quantitative Bacterial Culture (Non-Urine/Blood/Stool)

CPT code 87071 designates an aerobic quantitative culture technique used by laboratory personnel to determine the number of bacteria present in a submitted specimen, excluding urine, blood, and stool. This laboratory procedure is an important diagnostic tool in clinical microbiology, supporting infection diagnosis, antimicrobial stewardship, and treatment decisions when a precise bacterial load is clinically relevant. Nationally, standardized coding for quantitative cultures facilitates consistent reporting, reimbursement, and quality monitoring across hospitals and reference labs.

Key payers in the national context include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for the test, common sites of service, and the role of quantitative aerobic cultures in patient care. The publication also outlines applicable payer coverage considerations and common modifiers used with this service when available. Where benchmarking or payer-specific guidance is required, the report indicates when Data not available in the input.

This summary prepares clinicians, billing professionals, and policy analysts to understand how CPT code 87071 is used, what clinical scenarios prompt its use, and what types of benchmarks or policy updates to look for in payer determinations and laboratory practice guidance.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 87071aerobic culturequantitative microbiologyclinical laboratorymicrobiology testinglaboratory billingdiagnostic microbiologyinfection diagnosisantimicrobial stewardship

Billing Code Overview

CPT code 87071 describes an aerobic quantitative culture technique performed by a laboratory analyst or microbiologist to determine the number of bacteria in a submitted specimen. The procedure yields a quantitative bacterial count and applies to specimens that are not urine, blood, or stool.

Service Type: Microbiology — Quantitative Aerobic Culture

Typical Site of Service: Clinical laboratory or hospital laboratory

Data not available in the input for payers beyond the provided list, associated taxonomies, ICD-10 diagnoses, and related codes.

Clinical & Coding Specifications

Clinical Context

A 58-year-old patient presents to an outpatient wound clinic with a chronic lower-extremity ulcer that has increased exudate and malodor despite topical care. The clinician collects a pus/tissue swab (not urine, blood, or stool) and sends it to the clinical microbiology laboratory for quantitative aerobic culture to determine bacterial burden and guide topical or systemic therapy. In the laboratory, a microbiologist or lab analyst performs a standardized aerobic culture technique that yields colony counts (quantitative CFU/mL or CFU/g) and identifies dominant aerobic bacterial species. Results are reported to the ordering clinician to inform antimicrobial selection, wound management, and potential further testing such as antimicrobial susceptibility. Typical workflow steps: specimen receipt and accessioning, plating on appropriate aerobic media, incubation under aerobic conditions, colony counting and identification, and documentation of quantitative results in the laboratory information system with test code 87071 on the laboratory report.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the physician or laboratorian professional interpretation component separate from the technical work.
`TC`	Technical component	Use when billing only the technical component (laboratory processing and materials) without the professional interpretation.
`91`	Repeat clinical diagnostic laboratory test	Use when a repeat quantitative culture is medically necessary and performed within a clinically appropriate interval.
`90`	Reference (outside) laboratory	Use when the test is performed by a laboratory other than the billing laboratory.
`59`	Distinct procedural service	Use when `87071` is billed on the same day as another procedure and meets criteria for a distinct service.
`52`	Reduced services	Use when the service provided is partially reduced or not to full extent.
`53`	Discontinued procedure	Use when testing was started but discontinued for documented clinical reasons before completion.
`22`	Increased procedural services	Use when additional work or complexity beyond typical is documented and justifies increased payment.
`78`	Unplanned return to the operating/procedure room	Use when a specimen is collected during an unplanned return to a procedure room and the modifier is required for facility billing context.
`59`	Distinct procedural service	Use when another laboratory or clinical procedure on the same date is separate and distinct from the quantitative culture.
`90`	Reference (outside) laboratory	Use when test performed by an external reference lab (repeat entry for emphasis on relevance).
`XU`	Unusual non-overlapping service	Use when documentation supports that this laboratory service is distinct and not overlapping with another billed service.
`XE`	Separate encounter	Use when the specimen collection and testing occur on a separate encounter from other services.
`Q4`	Laboratory test performed using CLIA-waived methodology	Use only if applicable for waived-method quantitative testing, though most quantitative cultures are non-waived.

Taxonomy Code	Specialty	Notes
207Q00000X	Infectious Disease	Physicians who interpret complex microbiology and direct antimicrobial therapy.
1223G0001X	Clinical Pathology	Pathologists who oversee microbiology laboratories and interpret results.
207L00000X	Emergency Medicine	Clinicians who frequently order rapid quantitative cultures for acute wound or soft tissue infections.
208000000X	Family Medicine	Primary care clinicians who collect specimens and manage chronic wound infections.
3336C0002X	Clinical Laboratory Science/Medical Technologist	Laboratory personnel who perform the technical culture and quantitative enumeration.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`L97.909`	Non-pressure chronic ulcer of unspecified lower leg with unspecified severity	Chronic lower-extremity ulcers commonly require quantitative cultures to assess bacterial burden and guide therapy.
`L89.90`	Pressure ulcer of unspecified site, unspecified stage	Pressure ulcers often become colonized or infected; quantitative aerobic cultures inform debridement and antimicrobial decisions.
`A49.9`	Bacterial infection of unspecified site	When the infectious site is not clearly specified, a quantitative aerobic culture helps identify bacterial load and species.
`M86.9`	Osteomyelitis, unspecified	When bone infection is suspected adjacent to a wound, quantitative cultures from wound or tissue specimens assist in management.
`L03.90`	Cellulitis, unspecified	Cellulitis with drainage or purulence may prompt quantitative culture of wound exudate to guide antibiotic therapy.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`87070`	Aerobic culture, bacterial; any other source except urine, blood or stool, qualitative or semi-quantitative	Often performed alongside or as an alternative when only qualitative results are needed rather than quantitative counts.
`87075`	Anaerobic culture, bacterial; any source except urine, blood or stool, includes anaerobic culture techniques	Performed in addition to `87071` when anaerobic organisms are suspected in wounds or deep tissue infections.
`87081`	Culture for fungi, pathogenic organisms, other than dermatophytes; any source except urine, blood or stool	Ordered when fungal infection is a concern in chronic wounds and to complement bacterial culture results.
`87186`	Culture, bacterial; isolate identification by rapid biochemical test(s)	May follow `87071` when identified colonies require rapid biochemical identification beyond routine methods.
`87140`	Culture, bacterial; isolation and presumptive identification of bacteria	Used when the laboratory isolates bacteria from the quantitative culture for further identification steps.